Precise knowledge of the charge and rigidity dependence of the secondary cosmic ray fluxes and the secondary-to-primary flux ratios is essential in the understanding of cosmic ray propagation. We report the properties of heavy secondary cosmic ray fluorine F in the rigidity R range 2.15 GV to 2.9 TV based on 0.29 million events collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. The fluorine spectrum deviates from a single power law above 200 GV. The heavier secondary-to-primary F/Si flux ratio rigidity dependence is distinctly different from the lighter B/O (or B/C) rigidity dependence. In particular, above 10 GV, the F/SiB/O ratio can be described by a power law Rδ with δ=0.052±0.007. This shows that the propagation properties of heavy cosmic rays, from F to Si, are different from those of light cosmic rays, from He to O, and that the secondary cosmic rays have two classes.

Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer / Aguilar, M., Cavasonza, L.A., Allen, M.S., Alpat, B., Ambrosi, G., Arruda, L., Attig, N., Barao, F., Barrin, L., Bartoloni, A., Basegmez-Du Pree, S., Battiston, R., Behlmann, M., Beranek, B., Berdugo, J., Bertucci, B., Bindi, V., Bollweg, K., Borgia, B., Boschini, M.J., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 126:8(2021), p. 081102. [10.1103/PhysRevLett.126.081102]

Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer

Battiston R.;Burger W. J.;Dimiccoli F.;Lazzizzera I.;Nozzoli F.;Zuccon P.
2021-01-01

Abstract

Precise knowledge of the charge and rigidity dependence of the secondary cosmic ray fluxes and the secondary-to-primary flux ratios is essential in the understanding of cosmic ray propagation. We report the properties of heavy secondary cosmic ray fluorine F in the rigidity R range 2.15 GV to 2.9 TV based on 0.29 million events collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. The fluorine spectrum deviates from a single power law above 200 GV. The heavier secondary-to-primary F/Si flux ratio rigidity dependence is distinctly different from the lighter B/O (or B/C) rigidity dependence. In particular, above 10 GV, the F/SiB/O ratio can be described by a power law Rδ with δ=0.052±0.007. This shows that the propagation properties of heavy cosmic rays, from F to Si, are different from those of light cosmic rays, from He to O, and that the secondary cosmic rays have two classes.
2021
8
Aguilar, M.; Cavasonza, L. A.; Allen, M. S.; Alpat, B.; Ambrosi, G.; Arruda, L.; Attig, N.; Barao, F.; Barrin, L.; Bartoloni, A.; Basegmez-Du Pree, S....espandi
Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer / Aguilar, M., Cavasonza, L.A., Allen, M.S., Alpat, B., Ambrosi, G., Arruda, L., Attig, N., Barao, F., Barrin, L., Bartoloni, A., Basegmez-Du Pree, S., Battiston, R., Behlmann, M., Beranek, B., Berdugo, J., Bertucci, B., Bindi, V., Bollweg, K., Borgia, B., Boschini, M.J., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 126:8(2021), p. 081102. [10.1103/PhysRevLett.126.081102]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/300731
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